Soul Ties

How does one put into words the feeling where you are missing a piece of yourself, and knowing exactly what you need to fill that void?
Where one is fully aware that the only thing that can fill that aching hole is true love.
How does one explain a quickening of their heart when they lock eyes with a complete stranger, feeling completely and utterly at home?
Having feelings of memories that they know that they have never experienced but knowing in their heart of hearts that everything they feel is real.
There is only one explanation that would make sense. Two words that sums up the knowing and the feelings perfectly. There's no doubt that it's a soul tie.